Eaton KRP-C-650SP Fuse - Class L, 650A, 300 kAIC
Part Number: KRP-C-650SP
Quick Summary
The Eaton KRP-C-650SP fuse provides Class L time-delay protection for high-current panels and feeders. Engineers frequently face nuisance trips and downtime when protection isn't matched to inrush and startup loads. CE marked and RoHS compliant, it belongs to the Bussmann Series Class L family, delivering regulatory confidence and proven reliability. With a 650 A rating and a 300 kAIC interrupt capability at 600 Vac (and 100 kA at 300 Vdc), it covers diverse industrial circuits. The fuse's bolted blade ends and standard packaging simplify installation in control cabinets while reducing total cost of ownership and maintenance effort. This combination supports safer operations, regulatory alignment, and scalable protection across automation and power distribution applications.
Product Information
Extended Description
KRP-C-650SP Eaton: Eaton Bussmann Series Class L fuse, KRP-C, time-delay, current limiting fuse, 650 A, interrupting rating of 300 kA at 600 Vac and 100 kA at 300 Vdc
Product Name
Eaton Bussmann series KRP-C fuse
Catalog Number
KRP-C-650SP
UPC
051712605076
Product Length/Depth
8.63 in
Product Height
2.53 in
Product Width
2.53 in
Product Weight
3.8 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
650 A
Interrupt rating
300 kAIC at 600 Vac 100 kA at 300 kAIC Vdc
Response time
4 sec at 500%
Voltage rating
600 Vac, 300 Vdc
Packaging type
Standard
Class
Class L
Connection
Bolted blade end x bolted blade end
Fuse indicator
Non-indicating
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series KRP-C 601 to 2000A Class L fuse data sheet No. 1008
The KRP-C-650SP is a Class L time-delay fuse designed for high-current circuits in industrial panels and motor feeders. It provides selective protection that accommodates inrush and startup loads while delivering fast fault energy control, reducing nuisance trips and extending equipment life in manufacturing lines. This translates to fewer unscheduled downtimes and improved line throughput in automation cells. The 650 A rating paired with 300 kAIC at 600 Vac ensures robust fault clearance for large feeders, protecting transformers, bus bars, and critical buses without compromising selectivity. In DC environments, 100 kAIC at 300 Vdc supports protective coordination in mixed voltage systems. With 600 Vac / 300 Vdc rating, it covers both AC and DC segments, enabling streamlined protection across power distribution units and drive systems. Bolted blade ends provide secure, low-impedance connections, simplifying installation and maintenance while reducing contact resistance and thermal hotspots. The standard packaging type eases stocking and retrofits in existing Bussmann KRP-C installations. Compliance to CE and RoHS, along with the Class L designation, aligns with global regulatory expectations, helping you avoid compliance delays. A 4-second response at 500% overload balances fast outage protection with selectivity, minimizing arc energy and downstream damage in heavy-duty equipment. Overall, the KRP-C-650SP delivers reliable protection with practical installation benefits, supporting ROI through reduced downtime, safer operation, and easier lifecycle management in industrial automation environments.
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FAQs
Power down the panel and verify the KRP-C-650SP is the correct 650 A Class L fuse for the circuit. Use the bolted blade ends to establish a secure, low-impedance connection, ensuring clean seating in the holder. Consult the Eaton Bussmann data sheet No. 1008 for torque guidelines and replacement intervals, then test continuity after installation to confirm proper protection coordination.
Class L fuses provide a time-delay characteristic that tolerates motor inrush while still delivering rapid current limiting during a fault. This reduces nuisance trips on startup and minimizes arcing energy. The KRP-C-650SP combines this with a high interrupt rating, ensuring motor drives and feeders are protected without compromising uptime in automation facilities.
The KRP-C-650SP offers 300 kAIC interrupt rating at 600 Vac and 100 kA at 300 Vdc. These ratings provide robust fault clearance for high-energy AC circuits and DC bus protection, enabling safer operation in mixed-voltage systems and large-panel deployments while reducing the risk of cascading faults.
Yes. The KRP-C-650SP is CE marked and RoHS compliant, aligning with European regulatory requirements and environmental standards. This ensures global applicability in regulated industries and simplifies cross-border procurement for projects that require compliance with environmental and safety directives.
Using the KRP-C-650SP can lower maintenance costs by reducing nuisance trips and downtime due to its time-delay inrush tolerance and high fault-rupture capability. Compatibility with standard Bussmann KRP-C devices simplifies stocking and retrofits, enabling quicker replacements. The result is improved equipment uptime, safer operation, and faster incident response across industrial power circuits.